Prescribed and Diverted Methadone Toxicity in South Australia: An Update
Date
2024
Authors
Stephenson, L.
Van Den Heuvel, C.
Humphries, M.
Byard, R.W.
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Journal article
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American Journal of Forensic Medicine and Pathology, 2024; 45(2):124-129
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Lilli Stephenson, Corinna Van Den Heuvel, Melissa Humphries, and Roger W. Byard
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Abstract
Methadone is one of the most common medications currently prescribed for the treatment of opioid use disorders (OUDs). While methadone maintenance programs (MMPs) have been highly successful in the management and treatment of OUDs resulting in a reduced number of fatalities, the risk of overdose/toxicity remains. The current study was undertaken to analyze trends in overdoses attributed to prescribed and diverted methadone in South Australia (SA) between 2000 and 2019. Over the 20-year period, 344 methadone-related deaths occurred in SA with a significant increase in deaths over the study period ( P = 0.03). The mean age of decedents was 42.5 years with a male to female ratio of 1.8:1, with approximately 20% of decedents enrolled in a MMP at the time of death. Overall, only 5.2% of cases demonstrated methadone diversion, which was associated with methadone prescribed for chronic pain and was most likely to be diverted from a friend/housemate or a partner. However, the source of methadone in more than half of cases was unknown, so this is likely a significant underestimate of actual MMP methadone diversion and total methadone diversion.
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